SQL의 IFNULL()함수 MySQL의 COALESCE()함수로 사용

MS SQL에서 IFNULL(컬럼, 0) 컬럼값이 null이면, 0을 넣는 함수가 있습니다.

 

MySQL에서는  COALESCE(컬럼, 0)을 이용해서 null이면, 0을 넣는 함수를 사용합니다.

 

 

출처: ISNULL(value, 0) in WHERE clause MYSQL

 

I believe you are trying to use the IFNULL() function. IF you replaced with IFNULL that should fix your query.

I suggest you go one step further and use COALESCE() instead of IFNULL(), since COALESCE() is part of the SQL standard (and IFNULL() is not).

SELECT sc.no, scl.quantite, scl.description, scl.poids, 
scl.prix, sl_ref.refsl, sl_ref.codetva, sl_ref.tauxtva, sl_ref.compte 
FROM shop_commande 
AS sc, shop_commande_ligne AS scl, selectline_ref AS sl_ref 
WHERE sc.id = scl.shop_commande_id 
AND sl_ref.refshop = COALESCE(scl.shop_article_id, 0) 
AND sc.id NOT IN (SELECT id_command FROM selectline_flag)